Flexible Piezoresistive Film Pressure Sensor Based on Double-Sided Microstructure Sensing Layer

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Flexible thin-film pressure sensors are crucial for industrial inspection and human-computer interaction.
• Ultra-thin sensors often suffer from limited pressure response range and low sensitivity.
• Current microstructure fabrication methods are difficult to implement on ultra-thin layers and can affect sensor stability.

Purpose of the Study:

• To develop a novel flexible thin-film pressure sensor with improved performance.
• To overcome the limitations of existing ultra-thin pressure sensors.
• To enhance sensitivity, pressure range, and response time for practical applications.

Main Methods:

• A novel film pressure sensor design featuring a double-sided microstructure sensing layer was developed.
• The template method was employed for fabricating the microstructures.
• The sensor's performance characteristics were evaluated.

Main Results:

• The proposed sensor achieves high sensitivity (5.5 kPa^-1) and a wide pressure response range (140 kPa).
• The sensor exhibits a short response time (120 ms) and a low detection limit.
• The double-sided microstructures significantly enhance the sensor's performance.

Conclusions:

• The novel double-sided microstructure design offers a significant advancement in flexible thin-film pressure sensor technology.
• This sensor demonstrates considerable potential for distributed pressure sensing and industrial pressure monitoring.
• The developed sensor overcomes previous limitations in sensitivity and response range for ultra-thin devices.